Final answer:
The cautionary statement implies that one should not move machinery unless you have guidance or a clear signal from a spotter, ensuring safety when visibility is obstructed.
Step-by-step explanation:
When operating any heavy machinery, it's critically important to adhere to safety protocols to prevent accidents and injuries. The cautionary statement 'If you cannot see where the work is being done, do not move the machine unless' refers to a fundamental rule in equipment safety – one should never operate or move machinery without clear visibility of the work area or without proper guidance.
If visibility is compromised, the machine should only be moved if you have a clear signal from a spotter or guide who has a full view of the work area and can ensure that it is safe to do so. This prevents potential accidents that could harm the operator or others nearby. In any situation, following established safety procedures and using common sense are paramount when handling heavy equipment.